/* * Copyright © 2012 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Google Author(s): Behdad Esfahbod */ #ifndef HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH #define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH #include "hb-private.hh" #include "hb-ot-shape-complex-private.hh" /* buffer var allocations */ #define indic_category() complex_var_persistent_u8_0() /* indic_category_t */ #define indic_position() complex_var_persistent_u8_1() /* indic_matra_category_t */ #define INDIC_TABLE_ELEMENT_TYPE uint8_t /* Cateories used in the OpenType spec: * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */ /* Note: This enum is duplicated in the -machine.rl source file. * Not sure how to avoid duplication. */ enum indic_category_t { OT_X = 0, OT_C, OT_Ra, /* Not explicitly listed in the OT spec, but used in the grammar. */ OT_V, OT_N, OT_H, OT_ZWNJ, OT_ZWJ, OT_M, OT_SM, OT_VD, OT_A, OT_NBSP }; /* Visual positions in a syllable from left to right. */ enum indic_position_t { POS_RA_TO_BECOME_REPH, POS_LEFT_MATRA, POS_PRE_C, POS_BASE_C, POS_ABOVE_C, POS_BELOW_C, POS_POST_C, POS_MATRAS, POS_SMVD }; /* Categories used in IndicSyllabicCategory.txt from UCD. */ enum indic_syllabic_category_t { INDIC_SYLLABIC_CATEGORY_OTHER = OT_X, INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_X, INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM, INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP, INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_C, INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X, INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N, INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_X, INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X, INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_X, INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H, INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM, INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V, INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M, INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V }; /* Categories used in IndicSMatraCategory.txt from UCD */ enum indic_matra_category_t { INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_BASE_C, INDIC_MATRA_CATEGORY_LEFT = POS_LEFT_MATRA, INDIC_MATRA_CATEGORY_TOP = POS_MATRAS, INDIC_MATRA_CATEGORY_BOTTOM = POS_MATRAS, INDIC_MATRA_CATEGORY_RIGHT = POS_MATRAS, /* We don't really care much about these since we decompose them * in the generic pre-shaping layer. They will only be used if * the font does not cover the decomposition. In which case, we * define these as aliases to the place we want the split-matra * glyph to show up. Quite arbitrary. * * TODO: There are some split matras without Unicode decompositions. * We have to figure out what to do with them. */ INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = POS_MATRAS, INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = POS_LEFT_MATRA, INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = POS_MATRAS, INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = POS_MATRAS, INDIC_MATRA_CATEGORY_TOP_AND_LEFT = POS_LEFT_MATRA, INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = POS_LEFT_MATRA, INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = POS_MATRAS, INDIC_MATRA_CATEGORY_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE, INDIC_MATRA_CATEGORY_OVERSTRUCK = INDIC_MATRA_CATEGORY_NOT_APPLICABLE, INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = INDIC_MATRA_CATEGORY_NOT_APPLICABLE }; /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation * because gcc fails to optimize the latter and fills the table in at runtime. */ #define INDIC_COMBINE_CATEGORIES(S,M) \ (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \ ASSERT_STATIC_EXPR_ZERO (S < 16 && M < 16) + \ ((M << 4) | S)) #include "hb-ot-shape-complex-indic-table.hh" /* XXX * This is a hack for now. We should: * 1. Move this data into the main Indic table, * and/or * 2. Probe font lookups to determine consonant positions. */ static const struct consonant_position_t { hb_codepoint_t u; indic_position_t position; } consonant_positions[] = { {0x0930, POS_BELOW_C}, {0x09AC, POS_BELOW_C}, {0x09AF, POS_POST_C}, {0x09B0, POS_BELOW_C}, {0x09F0, POS_BELOW_C}, {0x0A2F, POS_POST_C}, {0x0A30, POS_BELOW_C}, {0x0A35, POS_BELOW_C}, {0x0A39, POS_BELOW_C}, {0x0AB0, POS_BELOW_C}, {0x0B24, POS_BELOW_C}, {0x0B28, POS_BELOW_C}, {0x0B2C, POS_BELOW_C}, {0x0B2D, POS_BELOW_C}, {0x0B2E, POS_BELOW_C}, {0x0B2F, POS_POST_C}, {0x0B30, POS_BELOW_C}, {0x0B32, POS_BELOW_C}, {0x0B33, POS_BELOW_C}, {0x0B5F, POS_POST_C}, {0x0B71, POS_BELOW_C}, {0x0C15, POS_BELOW_C}, {0x0C16, POS_BELOW_C}, {0x0C17, POS_BELOW_C}, {0x0C18, POS_BELOW_C}, {0x0C19, POS_BELOW_C}, {0x0C1A, POS_BELOW_C}, {0x0C1B, POS_BELOW_C}, {0x0C1C, POS_BELOW_C}, {0x0C1D, POS_BELOW_C}, {0x0C1E, POS_BELOW_C}, {0x0C1F, POS_BELOW_C}, {0x0C20, POS_BELOW_C}, {0x0C21, POS_BELOW_C}, {0x0C22, POS_BELOW_C}, {0x0C23, POS_BELOW_C}, {0x0C24, POS_BELOW_C}, {0x0C25, POS_BELOW_C}, {0x0C26, POS_BELOW_C}, {0x0C27, POS_BELOW_C}, {0x0C28, POS_BELOW_C}, {0x0C2A, POS_BELOW_C}, {0x0C2B, POS_BELOW_C}, {0x0C2C, POS_BELOW_C}, {0x0C2D, POS_BELOW_C}, {0x0C2E, POS_BELOW_C}, {0x0C2F, POS_BELOW_C}, {0x0C30, POS_BELOW_C}, {0x0C32, POS_BELOW_C}, {0x0C33, POS_BELOW_C}, {0x0C35, POS_BELOW_C}, {0x0C36, POS_BELOW_C}, {0x0C37, POS_BELOW_C}, {0x0C38, POS_BELOW_C}, {0x0C39, POS_BELOW_C}, {0x0C95, POS_BELOW_C}, {0x0C96, POS_BELOW_C}, {0x0C97, POS_BELOW_C}, {0x0C98, POS_BELOW_C}, {0x0C99, POS_BELOW_C}, {0x0C9A, POS_BELOW_C}, {0x0C9B, POS_BELOW_C}, {0x0C9C, POS_BELOW_C}, {0x0C9D, POS_BELOW_C}, {0x0C9E, POS_BELOW_C}, {0x0C9F, POS_BELOW_C}, {0x0CA0, POS_BELOW_C}, {0x0CA1, POS_BELOW_C}, {0x0CA2, POS_BELOW_C}, {0x0CA3, POS_BELOW_C}, {0x0CA4, POS_BELOW_C}, {0x0CA5, POS_BELOW_C}, {0x0CA6, POS_BELOW_C}, {0x0CA7, POS_BELOW_C}, {0x0CA8, POS_BELOW_C}, {0x0CAA, POS_BELOW_C}, {0x0CAB, POS_BELOW_C}, {0x0CAC, POS_BELOW_C}, {0x0CAD, POS_BELOW_C}, {0x0CAE, POS_BELOW_C}, {0x0CAF, POS_BELOW_C}, {0x0CB0, POS_BELOW_C}, {0x0CB2, POS_BELOW_C}, {0x0CB3, POS_BELOW_C}, {0x0CB5, POS_BELOW_C}, {0x0CB6, POS_BELOW_C}, {0x0CB7, POS_BELOW_C}, {0x0CB8, POS_BELOW_C}, {0x0CB9, POS_BELOW_C}, {0x0CDE, POS_BELOW_C}, {0x0D2F, POS_POST_C}, {0x0D30, POS_POST_C}, {0x0D32, POS_BELOW_C}, {0x0D35, POS_POST_C}, }; /* XXX * This is a hack for now. We should move this data into the main Indic table. * Or completely remove it and just check in the tables. */ static const hb_codepoint_t ra_chars[] = { 0x0930, /* Devanagari */ 0x09B0, /* Bengali */ 0x09F0, /* Bengali */ 0x0A30, /* Gurmukhi */ /* No Reph */ 0x0AB0, /* Gujarati */ 0x0B30, /* Oriya */ 0x0BB0, /* Tamil */ /* No Reph */ 0x0C30, /* Telugu */ /* No Reph */ 0x0CB0, /* Kannada */ 0x0D30, /* Malayalam */ /* No Reph */ }; #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */